Practice: Ball Shooter
A 2.5 in ball shooter with 3D-printed pulleys, a 4 in flywheel and a 2 in feeder, on nut-strip mounts.
01
Ball Shooter
Model a simple shooter: a flywheel and a feeder wheel, belt-driven by NEOs.
- 4 in shooter wheel throws; 2 in feeder accelerates the ball.
- 3D-printed pulleys with metal hex inserts so the bore won't strip.
- Mounted to nut strips.
FUSION 360 · SCREENSHOT
add → course-shots/1c-03/1.png
FIG 1
Key Specs
Wheels & Pulleys
- Shooter wheel 4 in; feeder 2 in
- Shooter pulley 24T, feeder 36T (1/2 hex)
- Motor pulley 18T or 12T
Plates & Mounts
- Side plates 1/4 in
- Nut strips: 6 in, #10-32 or #8-32 tapped
- Block-motor reference geometry
02
Build Notes
A few things to get right.
- Belt pitch length must be a multiple of 5 mm (whole tooth count).
- Nut-strip holes stagger on adjacent sides.
- Mirror one side plate — the motor cutout differs.
FUSION 360 · SCREENSHOT
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FIG 2
Recap
BALL SHOOTER
- 4 in flywheel + 2 in feeder, belt-driven
- 3D-printed pulleys with metal hex inserts
- Belt length a multiple of 5 mm
- Mirror the motor-side plate
Your Task
Build this
- Model what this lesson covers in Fusion 360.
- Use the AltSkripts tools where they apply.
- Save it with a clear name.
How to submit
- In Fusion: Share → Public Link → Copy.
- Paste the link below.
- A coach reviews it in AltHub.